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+--- Thread: Returning a value from a tkinter.button call (/thread-24463.html)
Returning a value from a tkinter.button call - markr0804 - Feb-15-2020
I am trying to code without using globals. I am using the tkinter.button (see below) to enter some numbers into a variable. Ideally I want the tkinter.button call to return the number entered so that I don't have to make use of the global.
Anyone any ideas ?
window_button = tkinter.Button(universe_window,text="0",font=(font,font_size_small),command=partial(Get_Number, "Display_Commands","0"))
window_button.place(x=654,y=310)
RE: Returning a value from a tkinter.button call - Gribouillis - Feb-15-2020
People often use class instances to hold values manipulated by tkinter callbacks. For example
class App:
def __init__(self):
... # some code
window_button = tkinter.Button(universe_window,text="0",font=(font,font_size_small),command=self.get_number)
window_button.place(x=654,y=310)
def get_number(self):
self.value = Get_Number("Display_Commands", "0")
RE: Returning a value from a tkinter.button call - markr0804 - Feb-15-2020
Thanks for the prompt response. I'm new to Python but slowly getting there I think. I pass parameters to the get_number function, will you amendment still allow this? [ You can see my code says command:partial...]
RE: Returning a value from a tkinter.button call - Gribouillis - Feb-15-2020
You can use partial with instance methods as in
partial(self.some_method, param1, param2). The advantage is that the method can store data in the self object.
RE: Returning a value from a tkinter.button call - markr0804 - Feb-16-2020
Again, thank you. How do I assign the returned value back to a variable ? Is it as simple as
variable = self.some_method